Raman and infrared studies of the metal-insulator transition in BaCo1-xNixS2

S. Sugai, N. Yamane, S. Kashima, K. Takenaka, H. Sasaki, M. Sato, S. Shamoto

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


The electronic states near the insulator-metal transition of stoichiometric BaCo1-xNixS2 were investigated utilizing the different selection rule for Raman scattering from reflection spectroscopy. The electronic Raman component at low energies is large even in the insulating phase at x = 0. The spectral intensity is preserved from 300 to 20 K in the insulating phase (x≤0.18), whereas in the metallic phase (x≥0.24), the B1g and B2g spectra increase, as temperature decreases. It suggests that the change is induced by the itinerant electronic states through the mass-enhanced-type insulator-metal transition.

Original languageEnglish
Pages (from-to)627-628
Number of pages2
JournalPhysica B: Condensed Matter
Publication statusPublished - 2000 Jun 1
EventYamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) - Nagano, Jpn
Duration: 1999 Aug 241999 Aug 28

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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